Burglar alarm



Apr. 24, 1923.

J. l. CONNELLY BURGLAR ALARM Filed May 13, 1922 Patented Apr. 24, 1923.

" rantee rer'rr cs;

' A JOSEPH LOONNELLY, or onroaeq rtmivors.

BURGLAR- ALARM.

Application filed May 13, 1922. Serial No. 560,627.

fl '0 (ZZZ whom. it may concern:

Be it known that I, Josnrrr I. CONNELLY, a citizen of the United 'Statesof America, and a resident of Chicago, county or" Cook, and State ofIllinois, have invented a new and usefu 1' Improvement in BurglarAlarms,

of which the-following is a'speoification.

This invention relates to burglar alarm devices for attachmentto'closures such as doors and windows.

The main objects of this invention are to provide aflburglar alarmdevice serving bothas a lock for securing adoor or window againstopening and also as an alarm for giving audible signal when an openingis attempted whilethe lock is set; to provide a device of the abovecharacter including improved means for shifting the locking element intoand out oflockingposition'; and to provide. a burglar alarm device whichis simple and effective and which may be readily attached to'the'door orwindow by means of a few screws.

An illustrative embodiment of this invention is shown inthe'accompanying drawings wherein Figure 1 is a side" elevation of a deviceembodying this-invention adapted for use on a door, the bell of thealarm being re moved for the. sake of clearness, and the doorbeing shownin a fragmentary elevation, j a

is a top plan of the device shown Fi 2 in Figure 1, the bell and doorbeing shown in section.

Fig, 3is a top 'plan of adevice embodying this invention and adaptedqforuseon a Window, a part of the latter being shown in section.

Fig. 45 is a side elevation of the device shown in FigureS and showingthe window in section. I I

I In th form'shown, the invention isembodied in a device including asupport for attachmentto one part of the closure anda locking bolt whichis shiftable into and out of coacting relation with a keeper formed onthe other part of the closure. Mounted on the lockingbolt is'an alarmincluding the usual spring motor. and detent. A control element fornormally holding the spring motor inactive is "also mounted on thelooking bolt 'andis arranged so asto be actuated for releasing theescapementv detent when the control element is forced against the keeperbypressure applied transversely to the locking bolt, as when a forcedentry is attempted while the closure is locked by the locking bolt.

Referring to Figures land2 ofthe drawings, the locking and alarm deviceis shown applied to a doorway including'a'hinged keeper 3 for receivingtheloc'king bolt.

The door attachment shown in Figures 1 and comprises a supporting plate4 havmg means for attachment to one of the parts 'door 1, and a door jam2 having the us'ual of the closure and having slidably mounted thereon alocking bolt 5, which carriesan audible signal device 6.

In the formshown, the supporting plate 4: is secured to the hinged door1 by'screws 7. The locking bolt'5 is provided with'a longitudinallyextendingcentrally located slot 8 slidably engaging apair of retainingscrews 9 mounted on the supporting plate i. Mounted on one end of thelocking bolt 5', is a knoblO, whereby the bolt is manually shifted intoand out of engagement with the keeper. I

The signal device 6 comprises a supporting frame 11 fixed onthe lockingbolt 5 'for'supporting thereon the usual form of spring motor 12,including a bell 13 mounted on a central post 1.4:,and an escapementdetent 15 which carries a hammer 16. The detent 15 is normally locked bya control element 17 for holding the spring 'motor inactive. i

The control element shown in Figures 1 and 2 comprises a dog 18 arrangedinlongilocking bolt5'. The dog 18 is pivotallysecured to the lockingbolt 5 by a pin 20, and is provided at its inner end with a'lug 21 whichcoacts with a shoulder in the form of a projecting part 22formed on the'detent 15 fonnormally locking the latter against operation. The lock 21is normally held in 'tudinally extending slot 12 formed in the tively,and frame 26. In the form shown, the window attachment comprises asupporting plate 27, on which 1s mounted a locking bolt 28, whichcarries an alarm deend of the dog forms a tripper which is arranged atthe inner end of the locking bolt 28 so as to be adapted to coact with akeeper 34 in the form of a bar carried by the upper sash 2 1 and slottedto provide shoulders 35. The outer end of the locking bolt 28 extendsthrough a latch member 36 and is provided with a pivoted arm 37 forengagement with lugs 38 formed on the latch member for securing thelocking bar in its operative position, as shown in Figures 3 and 4. Toshift the locking bar 28 out of operative position, the pivoted arm 37is raised to clear the lugs 38, so as to permit the locking bar to beshifted around its pivot.

In operation, to lock the closure, thellocking bolt is shifted intocoacting relation with the keeper, as shown in Figures 2 and 4. In theevent that a forced opening is attempted while thelocking bolt occupiesits closed position, the tripper arm or dog is forced against the keeperwhich releases the inner edge of the dog from the escapement detent,permitting the spring motor to actuate the bell hammer.

Although but one specific embodiment of this invention has been hereinshown and described, it will. be understood that numerous details of theconstruction shown may be altered or omitted without departing from thespirit of this invention as defined by the following claims.

I claim:

k 1. The combination with a keeper of a locking and alarm devicecomprising a support, alocking bolt arranged on said sup port andmovable relative thereto so as to be shiftable into and out of coactingrelation with the keeper, an alarm including a spring motor, a detentfor normally holding said motor inactive, a control element arranged torelease said detent, said control-element being mounted on said lockingbolt in position to be adapted to contact with the keeper and beactuated thereby when said control element is forced against the keeperby pressure applied transversely to the locking bolt.

2. The combination with a keeper of a locking and alarm devicecomprising a support, a locking bolt arranged on said support andmovable relative thereto so as to be shiftable into and out of coactingrelation with the keeper, an alarm including a.

be shiftable into and out of coacting rela tion with the keeper, analarm including a spring motor, a detent for normally holding said motorinactive, a dog pivotally mounted on said locking bolt and arranged tocoact with said detent, and a spring normally holding said dog inposition for looking said detent against operation, said dog beinglocated in position to be actuated by the keeper when said dog is forcedagainst the keeper by pressure applied transversely to the locking bolt.

4. The combination with a keeper of a locking and alarm devicecomprising a support, a locking bolt arranged on said support andmovable relative thereto so as to be shiftable into and out of coactingrelation with the keeper, an alarm including a spring motor andescapement detent, a hammer actuated by said detent, a shoulder formedon said detent, and a dog pivotally mounted on said locking bolt, oneend of said dog being arranged to coact with said shoulder for normallylocking said detent against operation, the other end of said dog beingarranged to, form a tripper movable transversely to said locking bolt.

5. The combination with a keeper of a locking and alarm device.comprising a Support, a locking bolt arranged on said support andmovable relative thereto so, as to be shiftable into and out of coactingrelation with the keeper, an alarm mounted on said locking bolt andincluding a spring motor, a detent for normally holding said motorinactive, and a dog pivotally mounted on said locking bolt and arrangedfor releasing said detent, said dog belng located in position to beactuated by the keeper when said dog is forced against the keeper bypressure applied transversely to the locking bolt. A I i 6. Thecombination with a keeper of a locking and alarm device comprising asupport, a locking bolt arranged on said support and movablerelativethereto so as to be shiftable into and out of coactingrelationwith the keeper, an alarm including a eration, said dog being located inposition. spring motor mounted on said locking bolt, to be actuated bythe keeper When said dog an eseapement detent for normally holding isforced against the keeper by pressure ap- 10 said motor inactive, ahammer mounted on plied transversely to the locking bolt.,

5 said detent, and'a dog pivotally mounted Signed at Chicago this 4thday of on said locking bolt and normally held in 1922. r i position forlocking said detent against op- JOSEPH I. CONNELLY.

